1898.] NATURAL SCIENCES OF PHILADELPHIA. 451 



Polybia flavicans Fabr. (=testaeea Fabr.). 



Mararu, April ; Santarem. Eighteen specimens. 

 Polybia paraensis Sauss. 



Same localities as flavicans. Five specimens. 

 Polybia chrysothorax Licbt. 



Chapada, January-April, October; Mararu, April; Santarem. 

 About 40 specimens. 



Polybia sericea Oliv. 



Nearly 200 specimens from various localities. The coloration 

 seems quite constant, no specimens of the variety with " abdomen 

 brunatre," mentioned by Saussure, being present. 



Polybia mexicana Sauss. • 



Four specimens from Rio de Janeiro in November, are perhaps 

 this species, as near as can be judged from the description. The legs 

 are apparently yellower and the body darker than in mexicana, 

 which species, how 7 ever, is quite variable according to Saussure. 



Polybia infernalis Sauss. 



Santarem. • Two specimens. One has quite distinct abdominal 

 fascise. 

 Polybia emaciata Luc. 



Twelve specimens from Mararu, April, and Santarem, agree with 

 the description of this species, except that the dark spot on vertex is 

 wanting. 



Polybia sedula Sauss. 



Over 75 specimens. Chapada, March, September, October ; 

 Mararu, April ; Sebastian. 



Polybia latior n. sp. 



9 or ^ . — Black, with a silky pile; legs brownish the four hind 

 coxse striped with yellow, and a narrow yellow stripe on post- 

 scutellum. 



Clypeus distinctly broader than long with tolerably strong punct- 

 ures ; ocelli in an equilateral triangle, the space between hind pair 

 equal to considerably more than half that between them and eyes ; 

 latter almost reaching mandibles; flagellum subclavate, the first 

 joint about as long as two following united ; pronotum short, finely 

 margined; dorsulum fully one-quarter longer than broad; middle 

 segment short, not longer than scutellum and postscutellum, sulcate 



